Table 1

Details of the enrolled studies showing the number of ACS cases admitted during 2019 and 2020

Study	Country	Observation period	2019				2020
Study	Country	Observation period	ACS	STEMI	NSTEMI	UA	ACS	STEMI	NSTEMI	UA
Zitelny et al12	USA	1/1 to 31/3	104	104			103	103
Solomon et al22	USA	1/1 to 14/4	1635				1504
Braiteh et al23	USA	1/3 and 30/4	113	28	85		67	23	44
Garcia et al19	USA	1/1 to 31/3	611	611			550	550
Gluckman et al24	USA	30/12 to 16/5	2664				2506
Lotfi et al25	USA		1092				1038
Coughlan et al26	Ireland	27/3 to 17/4	14	14			9	9
Wilson et al27	UK	19/2 to 14/4	388	388			199	199
Griffin28	UK	15/2 to 31/3	1888	621	1267		1210	477	733
Mafham et al29	UK	1/1 to 24/5	39 225				28 613
Papafaklis et al9	Greece	1/1 to 12/4	1077	327	479	271	771	247	352	172
Oikonomou et al10	Greece	9/3 to 12/4	141	45	96		60	21	39
Piccolo et al30	Italy	30/1 to 26/3	1621	724	897		1093	489	604
De Filippo et al14	Italy	1/1 to 31/3	765				547
De Rosa et al31	Italy	12/3 to 19/3	618	268	350		319	197	122
Di Liberto et al32	Italy	1/3 to 25/4	46	46			26	26
Secco et al11	Italy	1/3 to 31/3	162	66	93	3	84	49	33	2
Toniolo et al16	Italy	1/3 to 31/3	71	21	32		34	10	6
Trabattoni et al21	Italy	8/3 to 10/4	19	10	9		68	46	22
Vecchio et al33	Italy	9/3 to 9/4	49	49			31	31
Cammalleri et al34	Italy	1/3 to 31/3	35	35			13	13
Kessler et al17	Germany	1/3 to 30/4	3411	677	2584		2509	510	1911
Schwarz et al35	Germany	1/1 to 19/4	180	50	64	69	101	34	51	16
Gitt et al36	Germany	1/1 to 21/4	502	103	197	202	425	118	154	153
Scholz et al37	Germany	1/1 to 31/3	443	443			387	387
Seiffert et al20	Germany	1/1 to 31/5	11 032	3350	7682		9458	2940	6518
Claeys et al18	Belgium	13/3 to 3/4	260	260			188	188
Daoulah et al38	Saudi Arabia	1/1 to 30/4	635	635			500	500
Félix-Oliveira et al15	Portugal	1/3 to 31/3	28	28			12	12
Gąsior et al13	Poland	9/3 to 16/4	2524				1424
Hauguel-Moreau et al39	France	17/2 to 26/4	107	63	44		37	16	21
Lantelme et al40	France	1/1 to 5/4	142				98
Rangé et al41	France	1/1 to 14/4	693	693			615	615
Romaguera et al42	Spain	1/1 to 19/4	524				395
Tam et al43	China	17/2 to 26/4	107	63	44		37	16	21
Toner et al7	Australia	16/3 to 15/4	102				20	3	17
Li et al8	Taiwan	1/2 to 30/4	1092	1092			1038	1038
Sharif Khan et al44	Pakistan	23/3 to 7/5	621	621	748		386	386	207
Khalil et al45	Turkey	10/3 to 30/4	404	404			121	121
Butt et al46	Qatar	1/3 to 31/3	171				114

ACS, acute coronary syndrome; NSTEMI, non-ST-elevation myocardial infarction; UA, unstable angina.